The number of GET/POST parameters exceeded settings.DATA_UPLOAD_MAX_NUMBER_FIELDS

Question

I got an error: "The number of GET/POST parameters exceeded settings.DATA_UPLOAD_MAX_NUMBER_FIELDS".

Error says that TooManyFieldsSent at /api/upload.

I wrote in my views.py.

def upload(request):
    id, array = common(request)

    if request.FILES:
        file = request.FILES['req'].temporary_file_path()
    else:
        return HttpResponse('<h1>NG</h1>')

    return HttpResponse('<h1>OK</h1>')

def common(request):
    id = json_body.get("access", "0")
    if id == "":
        id = "0"

    s = []
    with open(ID_TXT, 'r') as f:
        for line in f:
            s += list(map(int, line.rstrip().split(',')[:-1]))

    array = [s[i:i + 2] for i in range(0, len(s), 2)]

    return id, array

I post access & req data by using POSTMAN like:

I think this error is limitation of being able to send file size, so I added the code to settings.py

DATA_UPLOAD_MAX_MEMORY_SIZE = 100000000

But the error didn't solved. I read this page: How to avoid "The number of GET/POST parameters exceeded" error? as a reference. How should I fix this?

Answer 1

as django's doc says, the value of DATA_UPLOAD_MAX_NUMBER_FIELDS is default 1000, so once your form contains more fields than that number you will get the TooManyFields error.

check out here: https://docs.djangoproject.com/en/stable/ref/settings/

so the solution is simple I think, if DATA_UPLOAD_MAX_NUMBER_FIELDS exists if your settings.py, change it's value to a higher one, or, if it doesn't, add it to settings.py:

DATA_UPLOAD_MAX_NUMBER_FIELDS = 10240 # higher than the count of fields

Answer 2

This happened when I tried posting a huge list values to Backend. In my case I had the liberty of sending the list as a string, and it worked. Django by default has this check to prevent Suspicious activity(SuspiciousOperation).

However below setting will also work.

# to disable the check
DATA_UPLOAD_MAX_NUMBER_FIELDS = None

You can set this to None to disable the check. Applications that are expected to receive an unusually large number of form fields should tune this setting. From Django official documentation. https://docs.djangoproject.com/en/3.1/ref/settings/#data-upload-max-number-fields